1) 2Al + 3Br2 → 2AlBr3;
2) ZnO + 2HBr → ZnBr2 + H2O;
3) Al2O3 + 6HCl → 2AlCl3 + 3H2O;
4) 2Na + 2H2O → 2NaOH + H2;
5) 2PbS + 3O2 → 2PbO + 2SO2;
6) 2K + H2 → 2KH;
7) 6Na + N2 → 2Na3N;
8) 3Mg + 2P → Mg3P2.
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Answers & Comments
1) 2Al + 3Br2 → 2AlBr3;
2) ZnO + 2HBr → ZnBr2 + H2O;
3) Al2O3 + 6HCl → 2AlCl3 + 3H2O;
4) 2Na + 2H2O → 2NaOH + H2;
5) 2PbS + 3O2 → 2PbO + 2SO2;
6) 2K + H2 → 2KH;
7) 6Na + N2 → 2Na3N;
8) 3Mg + 2P → Mg3P2.